Apparatus, system and method of communicating a wakeup packet

ABSTRACT

Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating a wakeup packet. For example, an apparatus may include circuitry configured to cause a first wireless device to modulate a preamble of a wakeup packet according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme; modulate a payload of the wakeup packet according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones; and transmit the wakeup packet to a second wireless device.

CROSS REFERENCE

This application claims the benefit of and priority from U.S.Provisional Patent Application No. 62/162,766 entitled “Apparatus,System and Method of Communicating a Packet Including an On-Off Keying(OOK) Payload”, filed May 17, 2015, the entire disclosure of which isincorporated herein by reference.

TECHNICAL FIELD

Embodiments described herein generally relate to communicating a wakeuppacket.

BACKGROUND

Some computing devices, for example, small computing devices, such as,for example, wearable devices and/or sensors, are constrained by a smallbattery capacity.

However, such devices may be required to support wireless communicationtechnologies such as, for example, Wi-Fi, and/or Bluetooth (BT), forexample, to connect to other computing devices, e.g., a Smartphone, forexample, to exchange data.

Exchanging data using the wireless communication technologies mayconsume power of the battery, and it may be beneficial, or evencritical, to minimize energy consumption of one or more communicationblocks in such computing devices.

BRIEF DESCRIPTION OF THE DRAWINGS

For simplicity and clarity of illustration, elements shown in thefigures have not necessarily been drawn to scale. For example, thedimensions of some of the elements may be exaggerated relative to otherelements for clarity of presentation. Furthermore, reference numeralsmay be repeated among the figures to indicate corresponding or analogouselements. The figures are listed below.

FIG. 1 is a schematic block diagram illustration of a system, inaccordance with some demonstrative embodiments.

FIG. 2 is a schematic illustration of a wakeup packet, in accordancewith some demonstrative embodiments.

FIG. 3 is a schematic illustration of a plurality ofOrthogonal-Frequency-Division Multiplexing (OFDM) tones of an On-OffKeying (OOK) transmit pulse, in accordance with some demonstrativeembodiments.

FIG. 4 is a schematic illustration of an OOK transmit pulse, inaccordance with some demonstrative embodiments.

FIG. 5 is a schematic illustration of a wakeup packet transmission, inaccordance with some demonstrative embodiments.

FIG. 6 is a schematic flow-chart illustration of a method ofcommunicating a wakeup packet, in accordance with some demonstrativeembodiments.

FIG. 7 is a schematic illustration of a product of manufacture, inaccordance with some demonstrative embodiments.

DETAILED DESCRIPTION

In the following detailed description, numerous specific details are setforth in order to provide a thorough understanding of some embodiments.However, it will be understood by persons of ordinary skill in the artthat some embodiments may be practiced without these specific details.In other instances, well-known methods, procedures, components, unitsand/or circuits have not been described in detail so as not to obscurethe discussion.

Discussions herein utilizing terms such as, for example, “processing”,“computing”, “calculating”, “determining”, “establishing”, “analyzing”,“checking”, or the like, may refer to operation(s) and/or process(es) ofa computer, a computing platform, a computing system, or otherelectronic computing device, that manipulate and/or transform datarepresented as physical (e.g., electronic) quantities within thecomputer's registers and/or memories into other data similarlyrepresented as physical quantities within the computer's registersand/or memories or other information storage medium that may storeinstructions to perform operations and/or processes.

The terms “plurality” and “a plurality”, as used herein, include, forexample, “multiple” or “two or more”. For example, “a plurality ofitems” includes two or more items.

References to “one embodiment”, “an embodiment”, “demonstrativeembodiment”, “various embodiments” etc., indicate that the embodiment(s)so described may include a particular feature, structure, orcharacteristic, but not every embodiment necessarily includes theparticular feature, structure, or characteristic. Further, repeated useof the phrase “in one embodiment” does not necessarily refer to the sameembodiment, although it may.

As used herein, unless otherwise specified the use of the ordinaladjectives “first”, “second”, “third” etc., to describe a common object,merely indicate that different instances of like objects are beingreferred to, and are not intended to imply that the objects so describedmust be in a given sequence, either temporally, spatially, in ranking,or in any other manner.

Some embodiments may be used in conjunction with various devices andsystems, for example, a User Equipment (UE), a Mobile Device (MD), awireless station (STA), a Personal Computer (PC), a desktop computer, amobile computer, a laptop computer, a notebook computer, a tabletcomputer, a server computer, a handheld computer, a handheld device, anInternet of Things (IoT) device, a sensor device, a wearable device, aPersonal Digital Assistant (PDA) device, a handheld PDA device, anon-board device, an off-board device, a hybrid device, a vehiculardevice, a non-vehicular device, a mobile or portable device, a consumerdevice, a non-mobile or non-portable device, a wireless communicationstation, a wireless communication device, a wireless Access Point (AP),a wired or wireless router, a wired or wireless modem, a video device,an audio device, an audio-video (A/V) device, a wired or wirelessnetwork, a wireless area network, a Wireless Video Area Network (WVAN),a Local Area Network (LAN), a Wireless LAN (WLAN), a Personal AreaNetwork (PAN), a Wireless PAN (WPAN), and the like.

Some embodiments may be used in conjunction with devices and/or networksoperating in accordance with existing IEEE 802.11 standards (includingIEEE 802.11-2012 (IEEE 802.11-2012, IEEE Standard for Informationtechnology—Telecommunications and information exchange between systemsLocal and metropolitan area networks—Specific requirements Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specifications, Mar. 29, 2012); IEEE802.11ac-2013 (“IEEE P802.11ac-2013, IEEE Standard for Information Technology—Telecommunications andInformation Exchange Between Systems—Local and Metropolitan AreaNetworks—Specific Requirements—Part 11: Wireless LAN Medium AccessControl (MAC) and Physical Layer (PHY) Specifications—Amendment 4:Enhancements for Very High Throughput for Operation in Bands below 6GHz”, December, 2013); IEEE 802.11ad (“IEEE P802.11ad-2012, IEEEStandard for Information Technology—Telecommunications and InformationExchange Between Systems—Local and Metropolitan Area Networks—SpecificRequirements—Part 11: Wireless LAN Medium Access Control (MAC) andPhysical Layer (PHY) Specifications—Amendment 3: Enhancements for VeryHigh Throughput in the 60 GHz Band”, 28 Dec. 2012); IEEE-802.11REVmc(“IEEE 802.11-REVmcm/D3.0, June 2014 draft standard for Informationtechnology—Telecommunications and information exchange between systemsLocal and metropolitan area networks Specific requirements; Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specification”); IEEE 802.11ax (IEEE 802.11ax, High Efficiency WLAN(HEW)); IEEE802.11-ay (P802.11ay Standard for InformationTechnology—Telecommunications and Information Exchange Between SystemsLocal and Metropolitan Area Networks—Specific Requirements Part 11:Wireless IAN Medium Access Control (MAC) and Physical Layer (PHY)Specifications—Amendment: Enhanced Throughput for Operation inLicense-Exempt Bands Above 45 GHz)) and/or future versions and/orderivatives thereof) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existingWireless-Gigabit-Alliance (WGA) specifications (Wireless GigabitAlliance, Inc WiGig MAC and PHY Specification Version 1.1, April 2011,Final specification) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existing WirelessFidelity (WiFi) Alliance (WFA) Peer-to-Peer (P2P) specifications (WiFiP2P technical specification, version 1.5, Aug. 4, 2014) and/or futureversions and/or derivatives thereof, devices and/or networks operatingin accordance with existing cellular specifications and/or protocols,e.g., 3rd Generation Partnership Project (3GPP), 3GPP Long TermEvolution (LTE) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existing Bluetooth(BT) specifications and/or protocols and/or future versions and/orderivatives thereof, units and/or devices which are part of the abovenetworks, and the like.

Some embodiments may be used in conjunction with one way and/or two-wayradio communication systems, cellular radio-telephone communicationsystems, a mobile phone, a cellular telephone, a wireless telephone, aPersonal Communication Systems (PCS) device, a PDA device whichincorporates a wireless communication device, a mobile or portableGlobal Positioning System (GPS) device, a device which incorporates aGPS receiver or transceiver or chip, a device which incorporates an RFIDelement or chip, a Multiple Input Multiple Output (MIMO) transceiver ordevice, a Single Input Multiple Output (SIMO) transceiver or device, aMultiple Input Single Output (MISO) transceiver or device, a devicehaving one or more internal antennas and/or external antennas, DigitalVideo Broadcast (DVB) devices or systems, multi-standard radio devicesor systems, a wired or wireless handheld device, e.g., a Smartphone, aWireless Application Protocol (WAP) device, or the like.

Some embodiments may be used in conjunction with one or more types ofwireless communication signals and/or systems, for example, RadioFrequency (RF), Infra Red (IR), Frequency-Division Multiplexing (FDM),Orthogonal FDM (OFDM), Orthogonal Frequency-Division Multiple Access(OFDMA), FDM Time-Division Multiplexing (TDM), Time-Division MultipleAccess (TDMA), Multi-User MIMO (MU-MIMO), Spatial Division MultipleAccess (SDMA), Extended TDMA (E-TDMA), General Packet Radio Service(GPRS), extended GPRS, Code-Division Multiple Access (CDMA), WidebandCDMA (WCDMA), CDMA 2000, single-carrier CDMA, multi-carrier CDMA,Multi-Carrier Modulation (MDM), Discrete Multi-Tone (DMT), Bluetooth®,Global Positioning System (GPS), Wi-Fi, Wi-Max, ZigBee™, Ultra-Wideband(UWB), Global System for Mobile communication (GSM), 2G, 2.5G, 3G, 3.5G,4G, Fifth Generation (5G), or Sixth Generation (6G) mobile networks,3GPP, Long Term Evolution (LTE), LTE advanced, Enhanced Data rates forGSM Evolution (EDGE), or the like. Other embodiments may be used invarious other devices, systems and/or networks.

The term “wireless device”, as used herein, includes, for example, adevice capable of wireless communication, a communication device capableof wireless communication, a communication station capable of wirelesscommunication, a portable or non-portable device capable of wirelesscommunication, or the like. In some demonstrative embodiments, awireless device may be or may include a peripheral that is integratedwith a computer, or a peripheral that is attached to a computer. In somedemonstrative embodiments, the term “wireless device” may optionallyinclude a wireless service.

The term “communicating” as used herein with respect to a communicationsignal includes transmitting the communication signal and/or receivingthe communication signal. For example, a communication unit, which iscapable of communicating a communication signal, may include atransmitter to transmit the communication signal to at least one othercommunication unit, and/or a communication receiver to receive thecommunication signal from at least one other communication unit. Theverb communicating may be used to refer to the action of transmitting orthe action of receiving. In one example, the phrase “communicating asignal” may refer to the action of transmitting the signal by a firstdevice, and may not necessarily include the action of receiving thesignal by a second device. In another example, the phrase “communicatinga signal” may refer to the action of receiving the signal by a firstdevice, and may not necessarily include the action of transmitting thesignal by a second device.

As used herein, the term “circuitry” may refer to, be part of, orinclude, an Application Specific Integrated Circuit (ASIC), anintegrated circuit, an electronic circuit, a processor (shared,dedicated, or group), and/or memory (shared, dedicated, group or), thatexecute one or more software or firmware programs, a combinational logiccircuit, and/or other suitable hardware components that provide thedescribed functionality. In some embodiments, the circuitry may beimplemented in, or functions associated with the circuitry may beimplemented by, one or more software or firmware modules. In someembodiments, circuitry may include logic, at least partially operable inhardware.

Some demonstrative embodiments may be used in conjunction with a WLAN,e.g., a WiFi network. Other embodiments may be used in conjunction withany other suitable wireless communication network, for example, awireless area network, a “piconet”, a WPAN, a WVAN and the like.

The term “antenna”, as used herein, may include any suitableconfiguration, structure and/or arrangement of one or more antennaelements, components, units, assemblies and/or arrays. In someembodiments, the antenna may implement transmit and receivefunctionalities using separate transmit and receive antenna elements. Insome embodiments, the antenna may implement transmit and receivefunctionalities using common and/or integrated transmit/receiveelements. The antenna may include, for example, a phased array antenna,a single element antenna, a set of switched beam antennas, and/or thelike.

Reference is made to FIG. 1, which schematically illustrates a system100, in accordance with some demonstrative embodiments.

As shown in FIG. 1, in some demonstrative embodiments, system 100 mayinclude one or more wireless communication devices. For example, system100 may include a first wireless communication device 102, and/or asecond wireless communication device 140.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude a mobile device or a non-mobile, e.g., a static, device. Forexample, device 102 and/or device 140 may include, for example, a UE, anMD, a STA, an AP, a PC, a desktop computer, a mobile computer, a laptopcomputer, an Ultrabook™ computer, a notebook computer, a tabletcomputer, a server computer, a handheld computer, an Internet of Things(IoT) device, sensor device, a wearable device, a BT device, a handhelddevice, a PDA device, a handheld PDA device, an on-board device, anoff-board device, a hybrid device (e.g., combining cellular phonefunctionalities with PDA device functionalities), a consumer device, avehicular device, a non-vehicular device, a mobile or portable device, anon-mobile or non-portable device, a mobile phone, a cellular telephone,a PCS device, a PDA device which incorporates a wireless communicationdevice, a mobile or portable GPS device, a DVB device, a relativelysmall computing device, a non-desktop computer, a “Carry Small LiveLarge” (CSLL) device, an Ultra Mobile Device (UMD), an Ultra Mobile PC(UMPC), a Mobile Internet Device (MID), an “Origami” device or computingdevice, a device that supports Dynamically Composable Computing (DCC), acontext-aware device, a video device, an audio device, an A/V device, aSet-Top-Box (STB), a Blu-ray disc (BD) player, a BD recorder, a DigitalVideo Disc (DVD) player, a High Definition (HD) DVD player, a DVDrecorder, a HD DVD recorder, a Personal Video Recorder (PVR), abroadcast HD receiver, a video source, an audio source, a video sink, anaudio sink, a stereo tuner, a broadcast radio receiver, a flat paneldisplay, a Personal Media Player (PMP), a digital video camera (DVC), adigital audio player, a speaker, an audio receiver, an audio amplifier,a gaming device, a data source, a data sink, a Digital Still camera(DSC), a media player, a Smartphone, a television, a music player, orthe like.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreSTAs. For example, device 102 may include at least one STA, and/ordevice 140 may include at least one STA.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreWLAN STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreWi-Fi STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or more BTdevices.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreNeighbor Awareness Networking (NAN) STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or morelocation measurement STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of any otherdevices and/or STAs.

In some demonstrative embodiments, device 102 may include, for example,one or more of a processor 191, an input unit 192, an output unit 193, amemory unit 194, and/or a storage unit 195; and/or device 140 mayinclude, for example, one or more of a processor 181, an input unit 182,an output unit 183, a memory unit 184, and/or a storage unit 185. Device102 and/or device 140 may optionally include other suitable additionalor alternative hardware components and/or software components. In somedemonstrative embodiments, some or all of the components of one or moreof device 102 and/or device 140 may be enclosed in a common housing orpackaging, and may be interconnected or operably associated using one ormore wired or wireless links. In other embodiments, components of one ormore of device 102 and/or device 140 may be distributed among multipleor separate devices.

In some demonstrative embodiments, processor 191 and/or processor 181may include, for example, a Central Processing Unit (CPU), a DigitalSignal Processor (DSP), one or more processor cores, a single-coreprocessor, a dual-core processor, a multiple-core processor, amicroprocessor, a host processor, a controller, a plurality ofprocessors or controllers, a chip, a microchip, one or more circuits,circuitry, a logic unit, an Integrated Circuit (IC), anApplication-Specific IC (ASIC), or any other suitable multi-purpose orspecific processor or controller. Processor 191 executes instructions,for example, of an Operating System (OS) of device 102 and/or of one ormore suitable applications. Processor 181 executes instructions, forexample, of an Operating System (OS) of device 140 and/or of one or moresuitable applications.

In some demonstrative embodiments, input unit 192 and/or input unit 182may include, for example, a keyboard, a keypad, a mouse, a touch-screen,a touch-pad, a track-ball, a stylus, a microphone, or other suitablepointing device or input device. Output unit 193 and/or output unit 183may include, for example, a monitor, a screen, a touch-screen, a flatpanel display, a Light Emitting Diode (LED) display unit, a LiquidCrystal Display (LCD) display unit, a plasma display unit, one or moreaudio speakers or earphones, or other suitable output devices.

In some demonstrative embodiments, memory unit 194 and/or memory unit184 may include, for example, a Random Access Memory (RAM), a Read OnlyMemory (ROM), a Dynamic RAM (DRAM), a Synchronous DRAM (SD-RAM), a flashmemory, a volatile memory, a non-volatile memory, a cache memory, abuffer, a short term memory unit, a long term memory unit, or othersuitable memory units. Storage unit 195 and/or storage unit 185 mayinclude, for example, a hard disk drive, a floppy disk drive, a CompactDisk (CD) drive, a CD-ROM drive, a DVD drive, or other suitableremovable or non-removable storage units. Memory unit 194 and/or storageunit 195, for example, may store data processed by device 102. Memoryunit 184 and/or storage unit 185, for example, may store data processedby device 140.

In some demonstrative embodiments, wireless communication device 102and/or device 140 may be capable of communicating content, data,information and/or signals via a wireless medium (WM) 103. In somedemonstrative embodiments, wireless medium 103 may include, for example,a radio channel, a cellular channel, an RF channel, a WiFi channel, anIR channel, a Bluetooth (BT) channel, a Global Navigation SatelliteSystem (GNSS) Channel, and the like.

In some demonstrative embodiments, WM 103 may include a channel over a2.4 Gigahertz (GHz) frequency band, a channel over a 5 GHz frequencyband, a channel over a millimeterWave (mmWave) frequency band, e.g., a60 GHz frequency band, a channel over a sub 1 Gigahertz (S1G) frequencyband, and/or any other channel over any other band.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude one or more radios including circuitry and/or logic to performwireless communication between devices 102, 140 and/or one or more otherwireless communication devices. For example, device 102 may include atleast one radio 114, and/or device 140 may include at least one radio144.

In some demonstrative embodiments, radios 114 and/or 144 may include oneor more wireless receivers (Rx) including circuitry and/or logic toreceive wireless communication signals, RF signals, frames, blocks,transmission streams, packets, messages, data items, and/or data. Forexample, radio 114 may include at least one receiver 116, and/or radio144 may include at least one receiver 146.

In some demonstrative embodiments, radios 114 and/or 144 may include oneor more wireless transmitters (Tx) including circuitry and/or logic totransmit wireless communication signals, RF signals, frames, blocks,transmission streams, packets, messages, data items, and/or data. Forexample, radio 114 may include at least one transmitter 118, and/orradio 144 may include at least one transmitter 148.

In some demonstrative embodiments, radio 114, radio 144, transmitter118, transmitter 148, receiver 116, and/or receiver 148 may includecircuitry; logic; Radio Frequency (RF) elements, circuitry and/or logic;baseband elements, circuitry and/or logic; modulation elements,circuitry and/or logic; demodulation elements, circuitry and/or logic;amplifiers; analog to digital and/or digital to analog converters;filters; and/or the like. For example, radios 114 and/or 144 may includeor may be implemented as part of a wireless Network Interface Card(NIC), and the like.

In some demonstrative embodiments, radios 114 and/or 144 may beconfigured to communicate according to an OFDM scheme. For example,radios 114 and/or 144 may include an OFDM receiver and/or an OFDMtransmitter. In other embodiments, radios 114 and/or 144 may beconfigured to communicate with any other additional or alternativemodulation scheme.

In some demonstrative embodiments, radios 114 and/or 144 may include, ormay be associated with, one or more antennas 107 and/or 147,respectively.

In one example, device 102 may include a single antenna 107. In anotherexample, device 102 may include two or more antennas 107.

In one example, device 140 may include a single antenna 147. In anotherexample, device 140 may include two or more antennas 147.

Antennas 107 and/or 147 may include any type of antennas suitable fortransmitting and/or receiving wireless communication signals, blocks,frames, transmission streams, packets, messages and/or data. Forexample, antennas 107 and/or 147 may include any suitable configuration,structure and/or arrangement of one or more antenna elements,components, units, assemblies and/or arrays. Antennas 107 and/or 147 mayinclude, for example, antennas suitable for directional communication,e.g., using beamforming techniques. For example, antennas 107 and/or 147may include a phased array antenna, a multiple element antenna, a set ofswitched beam antennas, and/or the like. In some embodiments, antennas107 and/or 147 may implement transmit and receive functionalities usingseparate transmit and receive antenna elements. In some embodiments,antennas 107 and/or 147 may implement transmit and receivefunctionalities using common and/or integrated transmit/receiveelements.

In some demonstrative embodiments, device 102 may include a controller124, and/or device 140 may include a controller 154. Controllers 124and/or 154 may be configured to perform one or more communications, maygenerate and/or communicate one or more messages and/or transmissions,and/or may perform one or more functionalities, operations and/orprocedures between devices 102, and/or 140 and/or one or more otherdevices, e.g., as described below.

In some demonstrative embodiments, controllers 124 and/or 154 mayinclude circuitry and/or logic, e.g., one or more processors includingcircuitry and/or logic, memory circuitry and/or logic, Media-AccessControl (MAC) circuitry and/or logic, Physical Layer (PHY) circuitryand/or logic, and/or any other circuitry and/or logic, configured toperform the functionality of controllers 124 and/or 154, respectively.Additionally or alternatively, one or more functionalities ofcontrollers 124 and/or 154 may be implemented by logic, which may beexecuted by a machine and/or one or more processors, e.g., as describedbelow.

In one example, controller 124 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause, trigger and/or control a wireless device, e.g., device 102,and/or a wireless station, e.g., a wireless STA implemented by device102, to perform one or more operations, communications and/orfunctionalities, e.g., as described herein.

In one example, controller 154 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause, trigger and/or control a wireless device, e.g., device 140,and/or a wireless station, e.g., a wireless STA implemented by device140, to perform one or more operations, communications and/orfunctionalities, e.g., as described herein.

In some demonstrative embodiments, device 102 may include a messageprocessor 128 configured to generate, process and/or access one ormessages communicated by device 102.

In one example, message processor 128 may be configured to generate oneor more messages to be transmitted by device 102, and/or messageprocessor 128 may be configured to access and/or to process one or moremessages received by device 102, e.g., as described below.

In some demonstrative embodiments, device 140 may include a messageprocessor 158 configured to generate, process and/or access one ormessages communicated by device 140.

In one example, message processor 158 may be configured to generate oneor more messages to be transmitted by device 140, and/or messageprocessor 158 may be configured to access and/or to process one or moremessages received by device 140, e.g., as described below.

In some demonstrative embodiments, message processors 128 and/or 158 mayinclude circuitry and/or logic, e.g., one or more processors includingcircuitry and/or logic, memory circuitry and/or logic, Media-AccessControl (MAC) circuitry and/or logic, Physical Layer (PHY) circuitryand/or logic, and/or any other circuitry and/or logic, configured toperform the functionality of message processors 128 and/or 158,respectively. Additionally or alternatively, one or more functionalitiesof message processors 128 and/or 158 may be implemented by logic, whichmay be executed by a machine and/or one or more processors, e.g., asdescribed below.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 128 may be implemented as part of radio 114, and/or atleast part of the functionality of message processor 158 may beimplemented as part of radio 144.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 128 may be implemented as part of controller 124,and/or at least part of the functionality of message processor 158 maybe implemented as part of controller 154.

In other embodiments, the functionality of message processor 128 may beimplemented as part of any other element of device 102, and/or thefunctionality of message processor 158 may be implemented as part of anyother element of device 140.

In some demonstrative embodiments, at least part of the functionality ofcontroller 124 and/or message processor 128 may be implemented by anintegrated circuit, for example, a chip, e.g., a System on Chip (SoC).In one example, the chip or SoC may be configured to perform one or morefunctionalities of radio 114. For example, the chip or SoC may includeone or more elements of controller 124, one or more elements of messageprocessor 128, and/or one or more elements of radio 114. In one example,controller 124, message processor 128, and radio 114 may be implementedas part of the chip or SoC.

In other embodiments, controller 124, message processor 128 and/or radio114 may be implemented by one or more additional or alternative elementsof device 102.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude a wearable device, a sensor, small device, a mobile device,and/or any other device, which may be, for example, powered by a batteryand/or any other power source having a limited capacity.

In some demonstrative embodiments, device 102 and/or device 140 maysupport wireless communication technologies such as, for example, Wi-Fi,Bluetooth (BT), and/or any other additional or alternative technology,for example, to connect between device 102, device 140, and/or otherwireless devices.

In some demonstrative embodiments, device 140 may include a wearabledevice and/or a sensor device powered by a power source having a limitedcapacity, e.g., a small battery.

In some demonstrative embodiments, device 140 may be configured tocommunicate data with another device, e.g., device 102, which may beless power constrained than device 140, for example, a Smartphone.

In some demonstrative embodiments, communicating data between device 102and device 140 may consume power of the power source of device 140.

In some demonstrative embodiments, minimizing energy consumption of oneor more communication blocks, modules and/or elements of device 140 maybe beneficial, and in some cases, even critical, for example, in orderto reduce and/or minimize power consumption of the power source ofdevice 140.

In some demonstrative embodiments, power consumption of device 140 maybe reduced, e.g., minimized, for example, by powering off one or morecommunication blocks, modules and/or elements of device 140, e.g., asmuch as possible, for example, while maintaining data transmissionand/or reception capabilities of device 140, e.g., without substantiallyincreasing latency and/or degrading quality of data communication.

In one example, one or more communication blocks, modules and/orelements of device 140 may be powered on and/or may be woken up, forexample, only when there is data to transmit, and/or only when there isdata to receive. According to this example, the one or morecommunication blocks, modules and/or elements of device 140 may bepowered off and/or switched to a sleep mode, for example, for the restof the time.

For example, one or more elements of radio 144 may be powered on and/ormay be woken up, for example, only when device 140 has data to transmit,and/or only when device 140 has data to receive. According to thisexample, one or more elements of radio 144 may be powered off and/orswitched to the sleep mode, for example, for the rest of the time.

In some demonstrative embodiments, device 140 may include a wakeupreceiver 150 configured to power on and/or to wakeup radio 144 of device140.

In some demonstrative embodiments, wakeup receiver 150 may wake up radio144, for example, based on a packet, e.g., a wakeup packet, receivedfrom another device, e.g., device 102, which is, for example, totransmit data to device 140.

In some demonstrative embodiments, wakeup receiver 150 may include areceiver 156 configured to receive the wakeup packet.

In some demonstrative embodiments, wakeup receiver 150 may includecircuitry and/or logic configured to receive, decode, demodulate, and/orprocess the wakeup packet.

In some demonstrative embodiments, receiver 156 may include circuitry;logic; Radio Frequency (RF) elements, circuitry and/or logic; basebandelements, circuitry and/or logic; demodulation elements, circuitryand/or logic; amplifiers; analog to digital converters; filters; and/orthe like.

In some demonstrative embodiments, wakeup receiver 150 may include acontroller 159 configured to control one or more operations and/orfunctionalities of wakeup receiver 150, e.g., for processing the wakeuppacket and/or waking up radio 144. For example, controller 159 may beconfigured to control a power supply of radio 144, and/or any othermechanism to wakeup radio 144, e.g., upon determining that a wakeuppacket has been received by wakeup receiver 150.

In some demonstrative embodiments, controller 159 may be configured toperform one or more communications, to generate and/or communicate oneor more messages and/or transmissions, and/or to perform one or morefunctionalities, operations and/or procedures, e.g., as described below.

In some demonstrative embodiments, controller 159 may include circuitryand/or logic, e.g., one or more processors including circuitry and/orlogic, memory circuitry and/or logic, Media-Access Control (MAC)circuitry and/or logic, Physical Layer (PHY) circuitry and/or logic,and/or any other circuitry and/or logic, configured to perform thefunctionality of controller 159. Additionally or alternatively, one ormore functionalities of controller 159 may be implemented by logic,which may be executed by a machine and/or one or more processors, e.g.,as described below.

In one example, controller 159 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause a wireless device, e.g., device 140, and/or a wireless station,e.g., a wireless STA implemented by device 140, to perform one or moreoperations, communications and/or functionalities, e.g., as describedherein.

In some demonstrative embodiments, wakeup receiver 150 may include amessage processor 157 configured to process and/or access one ormessages communicated by wakeup receiver 150.

In some demonstrative embodiments, message processor 157 may beconfigured to process one or more wakeup packets received by wakeupreceiver 150, and/or to indicate to controller 159 that a wakeup packetis received.

In one example, message processor 157 may be configured to access,process, demodulate and/or decode reception of the wakeup packets by awireless station, e.g., a wireless STA implemented by device 140.

In some demonstrative embodiments, message processor 157 may includecircuitry and/or logic, e.g., one or more processors including circuitryand/or logic, memory circuitry and/or logic, Media-Access Control (MAC)circuitry and/or logic, Physical Layer (PHY) circuitry and/or logic,and/or any other circuitry and/or logic, configured to perform thefunctionality of message processor 157. Additionally or alternatively,one or more functionalities of message processor 157 may be implementedby logic, which may be executed by a machine and/or one or moreprocessors, e.g., as described below.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 157 may be implemented as part of message processor158.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 157 may be implemented as part of any other element ofwakeup receiver 150. For example, at least part of the functionality ofmessage processor 157 may be implemented as part of receiver 156 and/orcontroller 159.

In some demonstrative embodiments, at least part of the functionality ofreceiver 156, controller 159 and/or message processor 157 may beimplemented by an integrated circuit, for example, a chip, e.g., aSystem on Chip (SoC). In one example, the chip or SoC may be configuredto perform one or more functionalities of radio 144, controller 154and/or message processor 158. For example, the chip or SoC may includeone or more elements of controller 159, one or more elements of messageprocessor 157, and/or one or more elements of receiver 156, one or moreelements of radio 144, one or more elements of message processor 158,and/or one or more elements of controller 154. In one example, wakeupreceiver 150, message processor 158, controller 154, and/or radio 144may be implemented as part of the chip or SoC.

In other embodiments, radio 144, wakeup receiver 150, controller 154and/or message processor 158 may be implemented by one or moreadditional or alternative elements of device 140.

In some demonstrative embodiments, wakeup receiver 150 may be associatedwith one or more of antennas 147, e.g., which may be shared with radio144.

In other embodiments, wakeup receiver 150 may include, or may beassociated with, another, e.g., separate, antenna.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto wake up radio 144, for example, if device 140 has data to transmit,and/or if data is to be received by radio 144.

In one example, wakeup receiver 150 may be configured to implement alow-power wakeup receiver (LP-WUR) scheme, for example, to wakeup radio144, e.g., only when device 140 is to receive data and/or to transmitdata.

In some demonstrative embodiments, wakeup receiver 150 may have, forexample, a relatively low power consumption, e.g., less than 100microwatts. Accordingly, the power consumption of device 140 may bereduced for example, during times when there is no data to be receivedat device 140 and only wakeup receiver 150 is on.

In some demonstrative embodiments, wakeup receiver 150 may wake up radio144, for example, based on a wakeup packet received from device 102.

In one example, receiver 156 may be configured to receive the wakeuppacket from device 102, message processor 156 may be configured toprocess the wakeup packet, and/or controller 159 may be configured towake up radio 144.

In some demonstrative embodiments, device 140 may be configured totransmit the wakeup packet to device 102, for example, to indicate towakeup receiver 150 that the radio 144 is to be woken up, e.g., toreceive data from device 102.

In some demonstrative embodiments, controller 159 may be configured tocause radio 144 to wake up, e.g., to switch to an active mode, forexample, to receive data from device 102, e.g., subsequent to receivingthe wakeup packet from device 102.

In some demonstrative embodiments, controller 159 may be configured tocause, control and/or trigger radio 144 to wake up, e.g., to switch toan active mode, for example, to transmit data to device 102 and/or toanother device.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to communicate the wakeup packet, for example, in compliancewith one or more wireless communication standards and/or protocols.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to communicate the wakeup packet, for example, in compliancewith one or more existing wireless communication standards and/orprotocols (“legacy standards”), for example, in compliance with one ormore IEEE 802.11 standards.

In some demonstrative embodiments, the wakeup packet may include apreamble (“legacy preamble”) in compliance with one or more legacystandards.

In some demonstrative embodiments, the wakeup packet may include apreamble in compliance with one or more legacy standards, for example,to enable one or more legacy devices to decode and/or process thepreamble.

In some demonstrative embodiments, the wakeup packet may include apayload, e.g., following the legacy preamble.

In some demonstrative embodiments, the payload may be modulated by asimple modulation scheme, for example, an On-Off Keying (OOK) modulationscheme.

Some demonstrative embodiments are described herein with respect to anOOK modulation scheme. However, in other embodiments the wakeup packetmay include a payload modulated according to any other Amplitude-ShiftKeying (ASK) modulation scheme, a Frequency Shift Keying (FSK)modulation scheme, and/or any other modulation scheme.

In some demonstrative embodiments, using a dedicated OOK transmitter tomodulate the payload may not be efficient.

In one example, it may not be efficient and/or advantageous to generatethe wakeup packet using a separate wakeup packet transmitter with an OOKmodulator. For example, in such implementation a device (“transmitterdevice”), transmitting the wakeup packet, e.g., device 102, may berequired to have two separate transmit modules, for example, a firsttransmit module, for example, an OFDM transmitter, e.g., radio 114, incompliance with the IEEE 802.11 standards, and a second transmitter,e.g., an OOK transmitter, to transmit the payload of the wakeup packet.

In some demonstrative embodiments, the transmitter device, e.g., device102, may be configured to generate a wakeup packet, for example, byreusing an OFDM transmitter, e.g., a transmitter in compliance with theIEEE 802.11 standards.

In some demonstrative embodiments, the transmitter device, e.g., device102, may be configured to use the same transmitter, for example, an OFDMtransmitter, e.g., radio 114, for example, to generate the wakeup packetincluding both the legacy preamble, which may be modulated using theOFDM modulation scheme, and the payload, e.g., which may be modulatedusing the OOK modulation scheme.

In some demonstrative embodiments, the transmitter device, e.g., device102, may be configured to generate a wakeup packet, for example, withoutneeding to use a dedicated transmit module, e.g., a dedicated OOKtransmit module.

In some demonstrative embodiments, device 102, may be configured to usetransmitter 118 of radio 114, for example, to generate the wakeup packetincluding both the legacy preamble and the wakeup payload, for example,without needing to use two separate transmit modules, e.g., as describedbelow.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to communicate a wakeup packet using a wakeup radio pulsedesign, which may be, for example, uniquely enabled by the re-use of theOFDM transmitter, e.g., as described below.

In some demonstrative embodiments, device 102 may generate a wakeuppacket including a preamble and a payload.

In one example, controller 124 may cause, trigger and/or control messagegenerator 128 to generate the wakeup packet.

In some demonstrative embodiments, controller 124 may be configured tocause, control, and/or trigger radio 114 to modulate the preamble of thewakeup packet according to an Orthogonal Frequency Division Multiplexing(OFDM) scheme, e.g., as described below.

In some demonstrative embodiments, controller 124 may be configured tocause, control, and/or trigger radio 114 to modulate the payload of thewakeup packet according to the OOK modulation scheme over a plurality ofOFDM tones of the OFDM scheme, e.g., as described below.

In some demonstrative embodiments, radio 114 may transmit the wakeuppacket to device 140.

In some demonstrative embodiments, wakeup receiver 150 may receive thewakeup packet.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto demodulate the preamble of the wakeup packet from device 102according to the OFDM scheme.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto demodulate the payload of the wakeup packet according to the OOKmodulation scheme over the plurality of the OFDM tones of the OFDMscheme.

In some demonstrative embodiments, wakeup receiver 150 may be configuredactivate radio 154 of device 140, for example, based on the payload ofthe wakeup packet, e.g., as described below.

In some demonstrative embodiments, the payload of the wakeup packet mayinclude a plurality of payload values, for example, a predefinedsequence of values, which may be configured to indicate that the packetis a wakeup packet, e.g., as described below with reference to FIG. 2.For example, wakeup receiver 150 may be configured to decode the payloadof a received packet, and to determine that the received packet is awakeup packet, for example, if the payload include the predefinedsequence of values.

In some demonstrative embodiments, controller 124 and/or messageprocessor 128 may be configured to set a signal field in the preamble toindicate at least a duration of the payload.

In some demonstrative embodiments, controller 124 and/or messageprocessor 128 may be configured to set a rate field and a length fieldin the signal field, for example, based on a number of the plurality ofOFDM tones, and a number of OOK bits in the payload, e.g., as describedbelow with reference to FIG. 2.

Reference is made to FIG. 2, which schematically illustrates a wakeuppacket 200, in accordance with some demonstrative embodiments.

In one example, device 102 (FIG. 1) may transmit wakeup packet 200 todevice 140 (FIG. 1), for example, to indicate to wakeup receiver 150(FIG. 1) that radio 144 (FIG. 1) is to be woken up.

In some demonstrative embodiments, message processor 128 (FIG. 1), maybe configured to construct and/or generate wakeup packet 200.

As shown in FIG. 2, wakeup packet 200 may include a preamble 220(“Legacy Preamble”) and a payload 230.

In some demonstrative embodiments, preamble 220 may include, forexample, a preamble construction in compliance with an IEEE 802.11standard (“Legacy 802.11 preamble construction”).

As shown in FIG. 2, preamble 220 may include a legacy short trainingfield (L-STF) 222, for example, based on the IEEE 802.11-2012 standard,e.g., according to section 18.3.3 (PLCP preamble), and/or in accordancewith any other section and/or of any other Standard.

As shown in FIG. 2, preamble 220 may include a legacy long trainingfield (L-LTF) 224, for example, based on the IEEE 802.11-2012 standard,e.g., according to section 18.3.3 (PLCP preamble), and/or in accordancewith any other section and/or of any other Standard.

As shown in FIG. 2, preamble 220 may include a signal field (L-SIG) 226,for example, based on the IEEE 802.11-2012 standard, e.g., according tosection 18.3.4 (SIGNAL field), and/or in accordance with any othersection and/or of any other Standard.

In some demonstrative embodiments, signal field 226 may include, forexample, a rate field and/or a length field, for example, to indicate atleast a duration of payload 230.

In some demonstrative embodiments, message processor 128 (FIG. 1) may beconfigured to set the rate field and the length field in signal field226, for example, based on a number of the plurality of OFDM tones, anda number of OOK bits in payload 230.

In some demonstrative embodiments, the rate field and/or the lengthfield may be set to values that indicate a longer time than an actuallength of payload 230, for example, to protect a response packet, whichmay follow wakeup packet 200.

As shown in FIG. 2, payload 230 may include a wakeup preamble field 232,a Media Access Control (MAC) header field 234, a Frame body 236, and/ora Frame Check Sequence (FCS) field 238. In other embodiments, payload230 may include any other additional or alternative fields.

Referring back to FIG. 1, in some demonstrative embodiments device 102may be configured to generate a payload of a wakeup packet, e.g.,payload 230 (FIG. 2), for example, according to an OOK transmit pulsedesign, e.g., as described below.

In some demonstrative embodiments, controller 124 may cause, triggerand/or control radio 114 to generate an OOK transmit pulse over theplurality of OFDM tones.

In some demonstrative embodiments, the plurality of OFDM tones mayinclude 12 OFDM tones.

In other embodiments, the plurality of OFDM tones may include any othernumber of OFDM tones, e.g., greater than or less than 12 OFDM tones.

In some demonstrative embodiments, message processor 128 may constructthe OOK transmit pulse, for example, to provide improved performance ofa wakeup radio link.

In some demonstrative embodiments, message processor 128 may constructthe OOK transmit pulse using the plurality of OFDM tones, e.g., asdescribed below.

In some demonstrative embodiments, a plurality of OFDM tones, includinga number, denoted n, of a total number, denoted m, of OFDM tones,wherein n<=m, may be used, for example, to construct the OOK transmitpulse, e.g., as described below with reference to FIGS. 3 and/or 4.

Reference is made to FIG. 3, which schematically illustrates a pluralityof OFDM tones 320 of an OOK transmit pulse 300, in accordance with somedemonstrative embodiments.

In one example, controller 124 (FIG. 1) may cause radio 114 (FIG. 1) togenerate the OOK transmit pulse 300 over the plurality of OFDM tones320.

As shown in FIG. 3, the plurality of OFDM tones 320 may include n tones,e.g., n=12, of a total number of m OFDM tones, e.g., m=64, for example,for a 20 Megahertz (MHz) channel According to this example, a wakeupsignal bandwidth may be, for example, 4.06 MHz.

For example, as shown in FIG. 3, the plurality of OFDM tones 320 mayinclude 12 tones centered on a central tone, e.g., a Direct Current (DC)tone, denoted “0”. For example, the plurality of OFDM tones 320 mayinclude six tones, denoted “−6”, “−5”, “−4”, “−3”, “−2”, and “4”, on oneside of the DC tone; and six tones, denoted “1”, “2”, “3”, “4”, “5”, and“6”, on another side of the DC tone.

In other embodiments, any other number of tones, and/or any otherarrangement of tones may be used.

In some demonstrative embodiments, the OOK transmit pulse 300 mayinclude, for example, the number n, e.g., n=12, of subcarriers, whichmay be modulated, for example, by elements of a predefined sequence,denoted S.

In some demonstrative embodiments, the sequence S may include, forexample, the following sequence:

-   -   S_(−26.26)=sqrt(13/6)*{0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,        0,0,0,0, 1+j, −1−j, 1+j, −1−j, −1−j, 1+j, 0, −1−j, −1−j, 1+j,        1+j, 1+j, 1+j, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0}

In other embodiments, any other sequence may be used.

In some demonstrative embodiments, controller 124 (FIG. 1) may beconfigured to cause, control, and/or trigger radio 114 (FIG. 1) togenerate the OOK transmit pulse 300, for example, using a transmitsignal generation scheme of OFDM signals.

In one example, the OOK transmit pulse may be generated, for example, incompliance with the IEEE 802.11-2012 standard, e.g., followed by a 0.8usec cyclic prefix extension.

Reference is made to FIG. 4, which schematically illustrates an OOKtransmit pulse 400, in accordance with some demonstrative embodiments.

In one example, controller 124 (FIG. 1) may be configured to cause,control, and/or trigger radio 114 (FIG. 1) to generate OOK transmitpulse 400, for example, over the plurality of frequency tones 320 (FIG.3), e.g., as described above.

Referring back to FIG. 1, in some demonstrative embodiments, controller124 may be configured to cause, control, and/or trigger radio 114 tomodulate a plurality of payload values of the wakeup payload byselectively transmitting an OOK transmit pulse, e.g., OOK transmit pulse400 (FIG. 4), during one or more OFDM symbol periods of a plurality ofOFDM symbol periods, e.g., as described below.

In some demonstrative embodiments, controller 124 may be configured tocause and/or trigger radio 114 to select whether or not to transmit theOOK transmit pulse over at least one OFDM symbol period, for example,based on a payload value.

In some demonstrative embodiments, controller 124 may be configured tocause and/or trigger radio 114 to select to transmit the OOK transmitpulse over the OFDM symbol period to indicate an on state of the OOKmodulation scheme. For example, controller 124 may select to causeand/or trigger radio 114 to transmit the OOK transmit pulse over theOFDM symbol period, for example, if the payload value is “1”.

In one example, controller 124 may be configured to cause, control,and/or trigger radio 114 to transmit a first value, e.g., a value of‘1’, in the payload field, for example, by transmitting the OOK transmitpulse, e.g., during one OFDM symbol period.

In some demonstrative embodiments, controller 124 may be configured tocause, control, and/or trigger radio 114 to select not to transmit theOOK transmit pulse over the OFDM symbol period to indicate an off stateof the OOK modulation scheme. For example, controller 124 may select notto cause radio 114 to transmit the OOK transmit pulse over the OFDMsymbol period, for example, if the payload value is “0”.

In one example, controller 124 may be configured to cause, controland/or trigger radio 114 to transmit a second value, e.g., a value of‘0’, in the payload field, for example, by selecting not to transmit theOOK transmit pulse, e.g., during one OFDM symbol period.

In some demonstrative embodiments, a simple r repetition coding, e.g.,an 1/r code rate, may be achieved, for example, by transmitting the OOKtransmit pulses during r OFDM symbol periods, e.g., to transmit a valueof ‘1’; and/or by not transmitting the OOK transmit pulse during r OFDMsymbol periods, e.g., to transmit the value of ‘0’.

In some demonstrative embodiments, wakeup receiver 150 may receive thewakeup packet including the payload modulated according to the OOKscheme.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto demodulate the plurality of payload values of the payload of thewakeup packet received from device 102, for example, by detecting whichOFDM symbol periods of the plurality of OFDM symbol periods include anOOK transmit pulse over the plurality of OFDM tones.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto determine a first OOK value of a payload value corresponding to atleast one OFDM symbol period, for example, when the OOK transmit pulseis received during the OFDM symbol period. For example, wakeup receiver150 may determine an “on” state of the OOK modulation scheme,representing a first payload value, e.g., “1”, corresponding to at leastone OFDM symbol period, for example, if the OOK transmit pulse isreceived during the OFDM symbol period.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto determine a second OOK value of a payload value corresponding to atleast one OFDM symbol period, for example, when the OOK transmit pulseis not received during the OFDM symbol period. For example, wakeupreceiver 150 may determine an “off” state of the OOK modulation scheme,representing a second payload value, e.g., “0”, corresponding to atleast one OFDM symbol period, for example, if the OOK transmit pulse isnot received during the OFDM symbol period.

In one example, wakeup receiver 150 may be configured to process thepayload of the wakeup packet from device 102, for example, bydetermining a value of ‘1’, e.g., with respect to a received OFDM symbolincluding the OOK transmit pulse; and/or determining a value of ‘0’,e.g., with respect to a received OFDM symbol not including the OOKtransmit pulse.

Reference is made to FIG. 5, which schematically illustrates atransmission of a wakeup packet 500, in accordance with somedemonstrative embodiments.

In one example, device 102 (FIG. 1) may transmit wakeup packet 500 todevice 140 (FIG. 1), for example, to indicate to wakeup receiver 150(FIG. 1) that radio 144 (FIG. 1) is to be woken up.

As shown in FIG. 5, wakeup packet 500 may include a legacy preamble 502followed by a payload 504.

In some demonstrative embodiments, legacy preamble 502 may be modulatedaccording to an OFDM modulation, e.g., as described above.

In some demonstrative embodiments, payload 504 may be modulatedaccording to the OOK modulation scheme over a plurality of OFDM tones,e.g., as described above.

As shown in FIG. 5, payload 504 may include an OOK transmit pulse 506,e.g., OOK transmit pulse 400 (FIG. 4).

Referring back to FIG. 1, a design of an OOK transmit pulse, e.g., OOKtransmit pulse 400 (FIG. 4), of a wake up packet, e.g., wakeup packet500 (FIG. 5), may be configured, for example, to provide improvedperformance of a wakeup scheme.

In some demonstrative embodiments, designing a wakeup radio receiver,e.g., wakeup receiver 150, for example, to meet extremely low powertargets may lead to some performance losses, e.g., due to frequencyoffsets and/or interference.

In some demonstrative embodiments, the design of the OOK transmit pulsemay be configured, for example, to reduce and/or mitigate theperformance loss, for example, by using frequency domain informationand/or hardware (HW) of an OFDM transmitter, e.g., transmitter 118.

In some demonstrative embodiments, controller 154 may be configured todetermine and/or adjust the subcarriers of the OOK transmit pulse, e.g.,the plurality of OFDM tones 320 (FIG. 3).

In some demonstrative embodiments, controller 154 may be configured toadjust and/or to adapt a number of the subcarriers, a location (index)of non-zero subcarriers, and/or a modulation on the subcarriers.

In some demonstrative embodiments, a sender of the wakeup transmitpulse, e.g., device 102, and/or a receiver of the wakeup packet, e.g.,device 140, may be configured to perform interference and/or frequencyoffset measurements on the received wakeup signal, e.g., periodically,for example, as described below.

In some demonstrative embodiments, controller 154 may be configured tocause device 140 to transmit to device 102 feedback informationconfigured to trigger an adjustment of the OOK modulation scheme overthe plurality of OFDM tones.

In some demonstrative embodiments, the feedback information may includea frequency offset of the plurality of OFDM tones, and/or aninterference to the plurality of OFDM tones, and/or information of oneor more additional or alternative attributes.

In some demonstrative embodiments, transmitter 148 may transmit thefeedback information to device 102.

In one example, controller 159 may control, cause and/or trigger messagegenerator 157 to generate a feedback message including the feedbackinformation, and controller 159 and/or controller 154 may control, causeand/or trigger transmitter 148 to transmit the feedback message todevice 102.

In some demonstrative embodiments, device 102 may receive the feedbackmessage.

In some demonstrative embodiments, controller 124 may be configured toselect the plurality of OFDM tones to be used for modulating the wakeuppacket, for example, based at least on the feedback information fromdevice 140.

In some demonstrative embodiments, controller 124 may be configured toadjust a modulation of the plurality of OFDM tones, e.g., based at leaston the feedback from device 140.

In one example, wakeup receiver 150 may feedback to radio 114, e.g., viaradio 144, information indicating a frequency offset of the plurality offrequency tones 320 (FIG. 3). For example, the frequency offset may beof +200 kHz.

According to this example, controller 124 may be configured to adapt theOOK transmit pulse in the frequency domain, for example, to compensatefor the frequency offset of the plurality of frequency tones 320 (FIG.3), e.g., the frequency offset of +200 kHz.

For example, controller 124 may be configured to shift the plurality offrequency tones 320 (FIG. 3) of the OOK transmit pulse 400 (FIG. 4) byone index to the left, for example, if a subcarrier width is 312.5 kHz,e.g., according to an IEEE 802.11-2012 standard. Accordingly, aresulting down converted signal at wakeup receiver 150 may be closer tobeing centered at the Direct Current (DC), for example, to reduce aSignal to Noise Ratio (SNR) loss, e.g., due to filtering and the like.

In another example, controller 124 may be configured to modify theamplitudes of the plurality of frequency tones 320 (FIG. 3) of the OOKtransmit pulse 400 (FIG. 4), for example, based at least on interferencemeasurements fed back from wakeup receiver 150. For example, controller124 may be configured to modify the amplitudes of the plurality offrequency tones 320 (FIG. 3), for example, to maximize an SNR at theoutput of a possible pulse matched filter, for example, at wakeupreceiver 150, e.g., to boost signal power at frequencies with lowerinterference.

In some demonstrative embodiments, adapting the design of the OOKtransmit pulse in the frequency domain may be a valuable option, forexample, at least for improving system performance.

In some demonstrative embodiments, using radio 114 to transmit thewakeup packet, for example, without using a dedicated OOK transmitter atdevice 102, may enable implementation of a wakeup scheme in a flexibleand/or easy manner.

Reference is made to FIG. 6, which schematically illustrates a method ofcommunicating a wakeup packet, in accordance with some demonstrativeembodiments. For example, one or more of the operations of the method ofFIG. 6 may be performed by one or more elements of a system, e.g.,system 100 (FIG. 1), for example, one or more wireless devices, e.g.,device 102 (FIG. 1), and/or device 140 (FIG. 1), a controller, e.g.,controller 159 (FIG. 1), controller 124 (FIG. 1) and/or controller 154(FIG. 1), a radio, e.g., radio 114 (FIG. 1) and/or radio 144 (FIG. 1), atransmitter, e.g., transmitter 118 and/or transmitter 148 (FIG. 1); areceiver e.g., receiver 116, receiver 156 and/or receiver 146 (FIG. 1);a wakeup receiver, e.g., wakeup receiver 150 (FIG. 1); and/or a messageprocessor, e.g., message processor 157 (FIG. 1), message processor 128(FIG. 1) and/or message processor 158 (FIG. 1).

As indicated at block 602, the method may include modulating at a firstdevice a preamble of a wakeup packet according to an OFDM scheme. Forexample, device 102 (FIG. 1) may modulate preamble 220 (FIG. 2) ofwakeup packet 220 (FIG. 2) according to the OFDM scheme, e.g., asdescribed above.

As indicated at block 604, the method may include modulating a payloadof the wakeup packet according to an OOK modulation scheme over aplurality of OFDM tones of the OFDM scheme. For example, device 102(FIG. 1) may modulate the payload 230 (FIG. 2) of the wakeup packet 200(FIG. 2) according to the OOK modulation scheme over the plurality ofOFDM tones of the OFDM scheme, e.g., as described above.

As indicated at block 606, modulating the payload of the wakeup packetmay include generating an OOK transmit pulse over the plurality of OFDMtones. For example, device 102 (FIG. 1) may generate the OOK transmitpulse 400 (FIG. 4) over the plurality of OFDM tones, e.g., as describedabove.

As indicated at block 608, modulating the payload of the wakeup packetmay include modulating a plurality of payload values of the payload byselectively transmitting the OOK transmit pulse during one or more OFDMsymbol periods of a plurality of OFDM symbol periods. For example,device 102 (FIG. 1) may modulate the payload 230 (FIG. 2) by modulatingthe plurality of payload values of the payload by selectivelytransmitting the OOK transmit pulse 400 (FIG. 4) during the one or moreOFDM symbol periods of the plurality of OFDM symbol periods, e.g., asdescribed above.

As indicated at block 610, the method may include transmitting thewakeup packet to a second wireless device. For example, device 102(FIG. 1) may transmit the wakeup packet to device 140 (FIG. 1), e.g., asdescribed above.

As indicated at block 612, the method may include demodulating, at awakeup receiver of the second wireless device, a preamble of the wakeuppacket from the first wireless device according to an OFDM scheme. Forexample, wakeup receiver 150 (FIG. 1) may demodulate preamble 220 (FIG.2) of the wakeup packet from the first wireless device according to theOFDM scheme, e.g., as described above.

As indicated at block 614, the method may include demodulating thepayload of the wakeup packet according to OOK modulation scheme over theplurality of OFDM tones of the OFDM scheme. For example, wakeup receiver150 (FIG. 1) may demodulate the payload 230 (FIG. 2) of the wakeuppacket according to the OOK modulation scheme over the plurality of OFDMtones 320 (FIG. 3), e.g., as described above.

As indicated at block 616, demodulating the payload of the wakeup packetmay include demodulating the plurality of payload values of the payloadby detecting which OFDM symbol periods of the plurality of OFDM symbolperiods include an OOK transmit pulse over the plurality of OFDM tones.For example, wakeup receiver 150 (FIG. 1) may demodulate the payload ofthe wakeup packet by detecting which OFDM symbol periods of theplurality of OFDM symbol periods include OOK transmit pulse 400 (FIG.4), e.g., as described above.

As indicated at block 618, the method may include activating atransceiver of the second wireless device based on the payload of thewakeup packet. For example, wakeup receiver 150 (FIG. 1) may activateradio 144 (FIG. 1), for example, based on the payload 230 (FIG. 2) ofthe wakeup packet 200 (FIG. 2), e.g., as described above.

Reference is made to FIG. 7, which schematically illustrates a productof manufacture 700, in accordance with some demonstrative embodiments.Product 700 may include a non-transitory machine-readable storage medium702 to store logic 704, which may be used, for example, to perform atleast part of the functionality of device 102 (FIG. 1), device 140 (FIG.1), radio 114 (FIG. 1), radio 144 (FIG. 1), wakeup receiver 150 (FIG.1), transmitter 118 (FIG. 1), transmitter 148 (FIG. 1), receiver 116(FIG. 1), receiver 146 (FIG. 1), controller 124 (FIG. 1), controller 154(FIG. 1), message processor 128 (FIG. 1), message processor 128 (FIG.1), and/or message processor 158 (FIG. 1), and/or to perform one or moreoperations of the method of FIG. 6, and/or one or more operationsdescribed herein. The phrase “non-transitory machine-readable medium” isdirected to include all computer-readable media, with the sole exceptionbeing a transitory propagating signal.

In some demonstrative embodiments, product 700 and/or machine-readablestorage medium 702 may include one or more types of computer-readablestorage media capable of storing data, including volatile memory,non-volatile memory, removable or non-removable memory, erasable ornon-erasable memory, writeable or re-writeable memory, and the like. Forexample, machine-readable storage medium 702 may include, RAM, DRAM,Double-Data-Rate DRAM (DDR-DRAM), SDRAM, static RAM (SRAM), ROM,programmable ROM (PROM), erasable programmable ROM (EPROM), electricallyerasable programmable ROM (EEPROM), Compact Disk ROM (CD-ROM), CompactDisk Recordable (CD-R), Compact Disk Rewriteable (CD-RW), flash memory(e.g., NOR or NAND flash memory), content addressable memory (CAM),polymer memory, phase-change memory, ferroelectric memory,silicon-oxide-nitride-oxide-silicon (SONOS) memory, a disk, a floppydisk, a hard drive, an optical disk, a magnetic disk, a card, a magneticcard, an optical card, a tape, a cassette, and the like. Thecomputer-readable storage media may include any suitable media involvedwith downloading or transferring a computer program from a remotecomputer to a requesting computer carried by data signals embodied in acarrier wave or other propagation medium through a communication link,e.g., a modem, radio or network connection.

In some demonstrative embodiments, logic 704 may include instructions,data, and/or code, which, if executed by a machine, may cause themachine to perform a method, process and/or operations as describedherein. The machine may include, for example, any suitable processingplatform, computing platform, computing device, processing device,computing system, processing system, computer, processor, or the like,and may be implemented using any suitable combination of hardware,software, firmware, and the like.

In some demonstrative embodiments, logic 704 may include, or may beimplemented as, software, a software module, an application, a program,a subroutine, instructions, an instruction set, computing code, words,values, symbols, and the like. The instructions may include any suitabletype of code, such as source code, compiled code, interpreted code,executable code, static code, dynamic code, and the like. Theinstructions may be implemented according to a predefined computerlanguage, manner or syntax, for instructing a processor to perform acertain function. The instructions may be implemented using any suitablehigh-level, low-level, object-oriented, visual, compiled and/orinterpreted programming language, such as C, C++, Java, BASIC, Matlab,Pascal, Visual BASIC, assembly language, machine code, and the like.

EXAMPLES

The following examples pertain to further embodiments.

Example 1 includes an apparatus comprising circuitry configured to causea first wireless device to modulate a preamble of a wakeup packetaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme; modulate a payload of the wakeup packet according to an On-Offkeying (OOK) modulation scheme over a plurality of OFDM tones of theOFDM scheme; and transmit the wakeup packet to a second wireless device.

Example 2 includes the subject matter of Example 1, and optionally,wherein the apparatus is configured to cause the first wireless deviceto generate an OOK transmit pulse over the plurality of OFDM tones, andto modulate a plurality of payload values of the payload by selectivelytransmitting the OOK transmit pulse during one or more OFDM symbolperiods of a plurality of OFDM symbol periods.

Example 3 includes the subject matter of Example 2, and optionally,wherein the apparatus is configured to cause the first wireless deviceto select, based on a payload value, whether or not to transmit the OOKtransmit pulse over at least one OFDM symbol period.

Example 4 includes the subject matter of Example 3, and optionally,wherein the apparatus is configured to cause the first wireless deviceto select to transmit the OOK transmit pulse over the OFDM symbol periodto indicate an On-state of the OOK modulation scheme, and to select notto transmit the OOK transmit pulse over the OFDM symbol period toindicate an Off-state of the OOK modulation scheme.

Example 5 includes the subject matter of any one of Examples 1-4, andoptionally, wherein the apparatus is configured to cause the firstwireless device to select the plurality of OFDM tones based on afeedback from the second wireless device.

Example 6 includes the subject matter of any one of Examples 1-5, andoptionally, wherein the apparatus is configured to cause the firstwireless device to adjust a modulation of the plurality of OFDM tonesbased on a feedback from the second wireless device.

Example 7 includes the subject matter of any one of Examples 1-6, andoptionally, wherein the apparatus is configured to cause the firstwireless device to set a signal field in the preamble to indicate atleast a duration of the payload.

Example 8 includes the subject matter of Example 7, and optionally,wherein the apparatus is configured to cause the first wireless deviceto set a rate field and a length field in the signal field based on anumber of the plurality of OFDM tones, and a number of OOK bits in thepayload.

Example 9 includes the subject matter of any one of Examples 1-8, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 10 includes the subject matter of any one of Examples 1-9, andoptionally, comprising a transmitter configured to transmit the wakeuppacket.

Example 11 includes the subject matter of any one of Examples 1-10, andoptionally, comprising one or more antennas, and a memory.

Example 12 includes a system of wireless communication comprising afirst wireless device, the first wireless device comprising one or moreantennas; a memory; a processor; and a radio configured to modulate apreamble of a wakeup packet according to an Orthogonal FrequencyDivision Multiplexing (OFDM) scheme, to modulate a payload of the wakeuppacket according to an On-Off keying (OOK) modulation scheme over aplurality of OFDM tones of the OFDM scheme, and to transmit the wakeuppacket to a second wireless device.

Example 13 includes the subject matter of Example 12, and optionally,wherein the first wireless device is to generate an OOK transmit pulseover the plurality of OFDM tones, and to modulate a plurality of payloadvalues of the payload by selectively transmitting the OOK transmit pulseduring one or more OFDM symbol periods of a plurality of OFDM symbolperiods.

Example 14 includes the subject matter of Example 13, and optionally,wherein the first wireless device is to select, based on a payloadvalue, whether or not to transmit the OOK transmit pulse over at leastone OFDM symbol period.

Example 15 includes the subject matter of Example 14, and optionally,wherein the first wireless device is to select to transmit the OOKtransmit pulse over the OFDM symbol period to indicate an On-state ofthe OOK modulation scheme, and to select not to transmit the OOKtransmit pulse over the OFDM symbol period to indicate an Off-state ofthe OOK modulation scheme.

Example 16 includes the subject matter of any one of Examples 12-15, andoptionally, wherein the first wireless device is to select the pluralityof OFDM tones based on a feedback from the second wireless device.

Example 17 includes the subject matter of any one of Examples 12-16, andoptionally, wherein the first wireless device is to adjust a modulationof the plurality of OFDM tones based on a feedback from the secondwireless device.

Example 18 includes the subject matter of any one of Examples 12-17, andoptionally, wherein the first wireless device is to set a signal fieldin the preamble to indicate at least a duration of the payload.

Example 19 includes the subject matter of Example 18, and optionally,wherein the first wireless device is to set a rate field and a lengthfield in the signal field based on a number of the plurality of OFDMtones, and a number of OOK bits in the payload.

Example 20 includes the subject matter of any one of Examples 12-19, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 21 includes a method to be performed by a first wireless device,the method comprising modulating a preamble of a wakeup packet accordingto an Orthogonal Frequency Division Multiplexing (OFDM) scheme;modulating a payload of the wakeup packet according to an On-Off keying(OOK) modulation scheme over a plurality of OFDM tones of the OFDMscheme; and transmitting the wakeup packet to a second wireless device.

Example 22 includes the subject matter of Example 21, and optionally,comprising generating an OOK transmit pulse over the plurality of OFDMtones, and modulating a plurality of payload values of the payload byselectively transmitting the OOK transmit pulse during one or more OFDMsymbol periods of a plurality of OFDM symbol periods.

Example 23 includes the subject matter of Example 22, and optionally,comprising selecting, based on a payload value, whether or not totransmit the OOK transmit pulse over at least one OFDM symbol period.

Example 24 includes the subject matter of Example 23, and optionally,comprising selecting to transmit the OOK transmit pulse over the OFDMsymbol period to indicate an On-state of the OOK modulation scheme, andselecting not to transmit the OOK transmit pulse over the OFDM symbolperiod to indicate an Off-state of the OOK modulation scheme.

Example 25 includes the subject matter of any one of Examples 21-24, andoptionally, comprising selecting the plurality of OFDM tones based on afeedback from the second wireless device.

Example 26 includes the subject matter of any one of Examples 21-25, andoptionally, comprising adjusting a modulation of the plurality of OFDMtones based on a feedback from the second wireless device.

Example 27 includes the subject matter of any one of Examples 21-26, andoptionally, comprising setting a signal field in the preamble toindicate at least a duration of the payload.

Example 28 includes the subject matter of Example 27, and optionally,comprising setting a rate field and a length field in the signal fieldbased on a number of the plurality of OFDM tones, and a number of OOKbits in the payload.

Example 29 includes the subject matter of any one of Examples 21-28, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 30 includes a product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone computer processor, enable the at least one computer processor toimplement one or more operations at a first wireless device, theoperations comprising modulating a preamble of a wakeup packet accordingto an Orthogonal Frequency Division Multiplexing (OFDM) scheme;modulating a payload of the wakeup packet according to an On-Off keying(OOK) modulation scheme over a plurality of OFDM tones of the OFDMscheme; and transmitting the wakeup packet to a second wireless device.

Example 31 includes the subject matter of Example 30, and optionally,wherein the operations comprise generating an OOK transmit pulse overthe plurality of OFDM tones, and modulating a plurality of payloadvalues of the payload by selectively transmitting the OOK transmit pulseduring one or more OFDM symbol periods of a plurality of OFDM symbolperiods.

Example 32 includes the subject matter of Example 31, and optionally,wherein the operations comprise selecting, based on a payload value,whether or not to transmit the OOK transmit pulse over at least one OFDMsymbol period.

Example 33 includes the subject matter of Example 32, and optionally,wherein the operations comprise selecting to transmit the OOK transmitpulse over the OFDM symbol period to indicate an On-state of the OOKmodulation scheme, and selecting not to transmit the OOK transmit pulseover the OFDM symbol period to indicate an Off-state of the OOKmodulation scheme.

Example 34 includes the subject matter of any one of Examples 30-33, andoptionally, wherein the operations comprise selecting the plurality ofOFDM tones based on a feedback from the second wireless device.

Example 35 includes the subject matter of any one of Examples 30-34, andoptionally, wherein the operations comprise adjusting a modulation ofthe plurality of OFDM tones based on a feedback from the second wirelessdevice.

Example 36 includes the subject matter of any one of Examples 30-35, andoptionally, wherein the operations comprise setting a signal field inthe preamble to indicate at least a duration of the payload.

Example 37 includes the subject matter of Example 36, and optionally,wherein the operations comprise setting a rate field and a length fieldin the signal field based on a number of the plurality of OFDM tones,and a number of OOK bits in the payload.

Example 38 includes the subject matter of any one of Examples 30-37, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 39 includes an apparatus of wireless communication by a firstwireless device, the apparatus comprising means for modulating at thefirst wireless device a preamble of a wakeup packet according to anOrthogonal Frequency Division Multiplexing (OFDM) scheme; means formodulating a payload of the wakeup packet according to an On-Off keying(OOK) modulation scheme over a plurality of OFDM tones of the OFDMscheme; and means for transmitting the wakeup packet to a secondwireless device.

Example 40 includes the subject matter of Example 39, and optionally,comprising means for generating an OOK transmit pulse over the pluralityof OFDM tones, and means for modulating a plurality of payload values ofthe payload by selectively transmitting the OOK transmit pulse duringone or more OFDM symbol periods of a plurality of OFDM symbol periods.

Example 41 includes the subject matter of Example 40, and optionally,comprising means for selecting, based on a payload value, whether or notto transmit the OOK transmit pulse over at least one OFDM symbol period.

Example 42 includes the subject matter of Example 41, and optionally,comprising means for selecting to transmit the OOK transmit pulse overthe OFDM symbol period to indicate an On-state of the OOK modulationscheme, and selecting not to transmit the OOK transmit pulse over theOFDM symbol period to indicate an Off-state of the OOK modulationscheme.

Example 43 includes the subject matter of any one of Examples 39-42, andoptionally, comprising means for selecting the plurality of OFDM tonesbased on a feedback from the second wireless device.

Example 44 includes the subject matter of any one of Examples 39-43, andoptionally, comprising means for adjusting a modulation of the pluralityof OFDM tones based on a feedback from the second wireless device.

Example 45 includes the subject matter of any one of Examples 39-44, andoptionally, comprising means for setting a signal field in the preambleto indicate at least a duration of the payload.

Example 46 includes the subject matter of Example 45, and optionally,comprising means for setting a rate field and a length field in thesignal field based on a number of the plurality of OFDM tones, and anumber of OOK bits in the payload.

Example 47 includes the subject matter of any one of Examples 39-46, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 48 includes an apparatus comprising circuitry configured tocause a first wireless device to demodulate, at a wakeup receiver of thefirst wireless device, a preamble of a wakeup packet from a secondwireless device according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme; demodulate, at the wakeup receiver of thefirst wireless device, a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme over a plurality of OFDM tones ofthe OFDM scheme; and based on the payload of the wakeup packet, activatea transceiver of the first wireless device.

Example 49 includes the subject matter of Example 48, and optionally,wherein the apparatus is configured to cause the first wireless deviceto demodulate a plurality of payload values of the payload by detectingwhich OFDM symbol periods of a plurality of OFDM symbol periods includean OOK transmit pulse over the plurality of OFDM tones.

Example 50 includes the subject matter of Example 49, and optionally,wherein the apparatus is configured to cause the first wireless deviceto determine an On-state of the OOK modulation scheme of a payload valuecorresponding to at least one OFDM symbol period when the OOK transmitpulse is received during the OFDM symbol period, and to determine anOff-state of the OOK modulation scheme of the payload valuecorresponding to the OFDM symbol period when the OOK transmit pulse isnot received during the OFDM symbol period.

Example 51 includes the subject matter of any one of Examples 48-50, andoptionally, wherein the apparatus is configured to cause the firstwireless device to transmit to the second wireless device feedbackinformation configured to trigger an adjustment of the OOK modulationscheme over the plurality of OFDM tones.

Example 52 includes the subject matter of Example 51, and optionally,wherein the feedback information comprises at least one attributeselected from the group consisting of a frequency offset of theplurality of OFDM tones, and an interference to the plurality of OFDMtones.

Example 53 includes the subject matter of any one of Examples 48-52, andoptionally, wherein the apparatus is configured to cause the firstwireless device to determine a length of the payload based on a signalfield in the preamble.

Example 54 includes the subject matter of any one of Examples 48-53, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 55 includes the subject matter of any one of Examples 48-54, andoptionally, comprising the wakeup receiver and the transceiver.

Example 56 includes the subject matter of any one of Examples 48-55, andoptionally, comprising one or more antennas, and a memory.

Example 57 includes a system of wireless communication comprising afirst wireless device, the first wireless device comprising one or moreantennas; a memory; a processor; a transceiver; and a wakeup receiverconfigured to demodulate a preamble of a wakeup packet from a secondwireless device according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme, to demodulate a payload of the wakeup packetaccording to an On-Off keying (OOK) modulation scheme over a pluralityof OFDM tones of the OFDM scheme, and based on the payload of the wakeuppacket, to activate the transceiver to communicate with the secondwireless device.

Example 58 includes the subject matter of Example 57, and optionally,wherein the first wireless device is to demodulate a plurality ofpayload values of the payload by detecting which OFDM symbol periods ofa plurality of OFDM symbol periods include an OOK transmit pulse overthe plurality of OFDM tones.

Example 59 includes the subject matter of Example 58, and optionally,wherein the first wireless device is to determine an On-state of the OOKmodulation scheme of a payload value corresponding to at least one OFDMsymbol period when the OOK transmit pulse is received during the OFDMsymbol period, and to determine an Off-state of the OOK modulationscheme of the payload value corresponding to the OFDM symbol period whenthe OOK transmit pulse is not received during the OFDM symbol period.

Example 60 includes the subject matter of any one of Examples 57-59, andoptionally, wherein the first wireless device is to transmit to thesecond wireless device feedback information configured to trigger anadjustment of the OOK modulation scheme over the plurality of OFDMtones.

Example 61 includes the subject matter of Example 60, and optionally,wherein the feedback information comprises at least one attributeselected from the group consisting of a frequency offset of theplurality of OFDM tones, and an interference to the plurality of OFDMtones.

Example 62 includes the subject matter of any one of Examples 57-61, andoptionally, wherein the first wireless device is to determine a lengthof the payload based on a signal field in the preamble.

Example 63 includes the subject matter of any one of Examples 57-62, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 64 includes a method to be performed by a first wireless device,the method comprising demodulating, at a wakeup receiver of the firstwireless device, a preamble of a wakeup packet from a second wirelessdevice according to an Orthogonal Frequency Division Multiplexing (OFDM)scheme; demodulating, at the wakeup receiver of the first wirelessdevice, a payload of the wakeup packet according to an On-Off keying(OOK) modulation scheme over a plurality of OFDM tones of the OFDMscheme; and based on the payload of the wakeup packet, activating atransceiver of the first wireless device.

Example 65 includes the subject matter of Example 64, and optionally,comprising demodulating a plurality of payload values of the payload bydetecting which OFDM symbol periods of a plurality of OFDM symbolperiods include an OOK transmit pulse over the plurality of OFDM tones.

Example 66 includes the subject matter of Example 65, and optionally,comprising determining an On-state of the OOK modulation scheme of apayload value corresponding to at least one OFDM symbol period when theOOK transmit pulse is received during the OFDM symbol period, anddetermining an Off-state of the OOK modulation scheme of the payloadvalue corresponding to the OFDM symbol period when the OOK transmitpulse is not received during the OFDM symbol period.

Example 67 includes the subject matter of any one of Examples 64-66, andoptionally, comprising transmitting to the second wireless devicefeedback information configured to trigger an adjustment of the OOKmodulation scheme over the plurality of OFDM tones.

Example 68 includes the subject matter of Example 67, and optionally,wherein the feedback information comprises at least one attributeselected from the group consisting of a frequency offset of theplurality of OFDM tones, and an interference to the plurality of OFDMtones.

Example 69 includes the subject matter of any one of Examples 64-68, andoptionally, comprising determining a length of the payload based on asignal field in the preamble.

Example 70 includes the subject matter of any one of Examples 64-69, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 71 includes a product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone computer processor, enable the at least one computer processor toimplement one or more operations at a first wireless device, theoperations comprising demodulating, at a wakeup receiver of the firstwireless device, a preamble of a wakeup packet from second wirelessdevice according to an Orthogonal Frequency Division Multiplexing (OFDM)scheme; demodulating, at the wakeup receiver of the first wirelessdevice, a payload of the wakeup packet according to an On-Off keying(OOK) modulation scheme over a plurality of OFDM tones of the OFDMscheme; and based on the payload of the wakeup packet, activating atransceiver of the first wireless device.

Example 72 includes the subject matter of Example 71, and optionally,wherein the operations comprise demodulating a plurality of payloadvalues of the payload by detecting which OFDM symbol periods of aplurality of OFDM symbol periods include an OOK transmit pulse over theplurality of OFDM tones.

Example 73 includes the subject matter of Example 72, and optionally,wherein the operations comprise determining an On-state of the OOKmodulation scheme of a payload value corresponding to at least one OFDMsymbol period when the OOK transmit pulse is received during the OFDMsymbol period, and determining an Off-state of the OOK modulation schemeof the payload value corresponding to the OFDM symbol period when theOOK transmit pulse is not received during the OFDM symbol period.

Example 74 includes the subject matter of any one of Examples 71-73, andoptionally, wherein the operations comprise transmitting to the secondwireless device feedback information configured to trigger an adjustmentof the OOK modulation scheme over the plurality of OFDM tones.

Example 75 includes the subject matter of Example 74, and optionally,wherein the feedback information comprises at least one attributeselected from the group consisting of a frequency offset of theplurality of OFDM tones, and an interference to the plurality of OFDMtones.

Example 76 includes the subject matter of any one of Examples 71-75, andoptionally, wherein the operations comprise determining a length of thepayload based on a signal field in the preamble.

Example 77 includes the subject matter of any one of Examples 71-76, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Example 78 includes an apparatus of wireless communication by a firstwireless device, the apparatus comprising means for demodulating, at awakeup receiver of the first wireless device, a preamble of a wakeuppacket from second wireless device according to an Orthogonal FrequencyDivision Multiplexing (OFDM) scheme; means for demodulating, at thewakeup receiver of the first wireless device, a payload of the wakeuppacket according to an On-Off keying (OOK) modulation scheme over aplurality of OFDM tones of the OFDM scheme; and means for, based on thepayload of the wakeup packet, activating a transceiver of the firstwireless device.

Example 79 includes the subject matter of Example 78, and optionally,comprising means for demodulating a plurality of payload values of thepayload by detecting which OFDM symbol periods of a plurality of OFDMsymbol periods include an OOK transmit pulse over the plurality of OFDMtones.

Example 80 includes the subject matter of Example 79, and optionally,comprising means for determining an On-state of the OOK modulationscheme of a payload value corresponding to at least one OFDM symbolperiod when the OOK transmit pulse is received during the OFDM symbolperiod, and determining an Off-state of the OOK modulation scheme of thepayload value corresponding to the OFDM symbol period when the OOKtransmit pulse is not received during the OFDM symbol period.

Example 81 includes the subject matter of any one of Examples 78-80, andoptionally, comprising means for transmitting to the second wirelessdevice feedback information configured to trigger an adjustment of theOOK modulation scheme over the plurality of OFDM tones.

Example 82 includes the subject matter of Example 81, and optionally,wherein the feedback information comprises at least one attributeselected from the group consisting of a frequency offset of theplurality of OFDM tones, and an interference to the plurality of OFDMtones.

Example 83 includes the subject matter of any one of Examples 78-82, andoptionally, comprising means for determining a length of the payloadbased on a signal field in the preamble.

Example 84 includes the subject matter of any one of Examples 78-83, andoptionally, wherein the plurality of OFDM tones comprises 12 OFDM tones.

Functions, operations, components and/or features described herein withreference to one or more embodiments, may be combined with, or may beutilized in combination with, one or more other functions, operations,components and/or features described herein with reference to one ormore other embodiments, or vice versa.

While certain features have been illustrated and described herein, manymodifications, substitutions, changes, and equivalents may occur tothose skilled in the art. It is, therefore, to be understood that theappended claims are intended to cover all such modifications and changesas fall within the true spirit of the disclosure.

What is claimed is:
 1. An apparatus comprising circuitry and logic configured to cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to: transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the apparatus configured to cause the first wireless communication device to select, based on a payload value of the payload, whether or not to cause the OFDM transmitter to transmit an OOK transmit pulse over the plurality of OFDM tones during at least one OFDM symbol period.
 2. The apparatus of claim 1 configured to cause the first wireless communication device to generate the OOK transmit pulse over the plurality of OFDM tones, and to modulate a plurality of payload values of the payload by selectively causing the OFDM transmitter to transmit the OOK transmit pulse during one or more OFDM symbol periods of a plurality of OFDM symbol periods.
 3. The apparatus of claim 1 comprising the OFDM transmitter.
 4. The apparatus of claim 1 comprising one or more antennas.
 5. An apparatus comprising circuitry and logic configured to cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to: transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and transmit a payload of the wakeup packet the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the apparatus configured to cause the first wireless communication device to modulate an On-state of the OOK modulation scheme by causing the OFDM transmitter to transmit an OOK transmit pulse over the plurality of OFDM tones during at least one OFDM symbol period, and to modulate an Off-state of the OOK modulation scheme by selecting not to cause the OFDM transmitter to transmit the OOK transmit pulse over the plurality of OFDM tones during the OFDM symbol period.
 6. The apparatus of claim 5, wherein the preamble comprises a signal field to indicate at least a duration of the payload.
 7. An apparatus comprising circuitry and logic configured to cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to: transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the apparatus configured to cause the first wireless communication device to select the plurality of OFDM tones based on a feedback from the second wireless communication device.
 8. The apparatus of claim 7, wherein the plurality of OFDM tones comprises 12 OFDM tones.
 9. An apparatus comprising circuitry and logic configured to cause an Orthogonal Frequency Division Multiplexing, (OFDM) transmitter of a first wireless communication device to: transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the apparatus configured to cause the first wireless communication device to adjust a modulation of the plurality of OFDM tones based on a feedback from the second wireless communication device.
 10. The apparatus of claim 9, wherein the preamble comprises a signal field to indicate at least a duration of the payload.
 11. An apparatus comprising circuitry and logic configured to cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to: transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and transmit a payload of the wakeup packet the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, wherein the preamble comprises a rate field and a length field, which are based on a number of the plurality of OFDM tones and a number of OOK bits in the payload.
 12. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor, enable the at least one computer processor to: cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and cause the OFDM transmitter to transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the instructions, when executed, cause the first wireless communication device to select, based on a payload value of the payload, whether or not to cause the OFDM transmitter to transmit an OOK transmit pulse over the plurality of OFDM tones during at least one OFDM symbol period.
 13. The product of claim 12, wherein the plurality of OFDM tones comprises 12 OFDM tones.
 14. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed, by at least one computer processor enable the at least one computer processor to: cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and cause the OFDM transmitter to transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the instructions, when executed, cause the first wireless communication device to: modulate an On-state of the OOK modulation scheme by causing the OFDM transmitter to transmit an OOK transmit pulse over the plurality of OFDM tones during at least one OFDM symbol period; and modulate an Off-state of the OOK modulation scheme by selecting not to cause the OFDM transmitter to transmit the OOK transmit pulse over the plurality of OFDM tones during the OFDM symbol period.
 15. The product of claim 14, wherein the preamble comprises a signal field to indicate at least a duration of the payload.
 16. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed, by at least one computer processor, enable the at least one computer processor to: cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and cause the OFDM transmitter to transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the instructions, when executed, cause the first wireless communication device to select the plurality of OFDM tones based on a feedback from the second wireless communication device.
 17. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed, by at least one computer processor, enable the at least one computer processor to: cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to transmit a preamble of a wakeup packet to a second wireless communication device the preamble modulated according to an OFDM scheme; and cause the OFDM transmitter to transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, the instructions, when executed, cause the first wireless communication device to adjust a modulation of the plurality of OFDM tones based on a feedback from the second wireless communication device.
 18. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed, by at least one computer processor, enable the at least one computer processor to: cause an Orthogonal Frequency Division Multiplexing (OFDM) transmitter of a first wireless communication device to transmit a preamble of a wakeup packet to a second wireless communication device, the preamble modulated according to an OFDM scheme; and cause the OFDM transmitter to transmit a payload of the wakeup packet, the payload modulated according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, wherein the preamble comprises a rate field and a length field, which are based on a number of the plurality of OFDM tones and a number of OOK bits in the payload.
 19. An apparatus comprising circuitry and logic configured to cause a first wireless communication device to: detect, at a wakeup receiver of the first wireless communication device, a wakeup packet from a second wireless communication device, a preamble of the wakeup packet from the second wireless communication device modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme; demodulate, at the wakeup receiver of the first wireless communication device, a payload of the wakeup packet according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, demodulating the payload comprises demodulating a payload value of the payload by determining an OOK On-state of the payload value when an OOK transmit pulse is detected during at least one OFDM symbol period, and determining an OOK Off-state of the payload value when the OOK transmit pulse is not detected during the OFDM symbol period; and based on the payload of the wakeup packet, activate a transceiver of the first wireless communication device.
 20. The apparatus of claim 19 comprising the wakeup receiver and the transceiver.
 21. An apparatus comprising circuitry and logic configured to cause a first wireless communication device to: detect, at a wakeup receiver of the first wireless communication device, a wakeup packet from a second wireless communication device, a preamble of the wakeup packet from the second wireless communication device modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme; demodulate, at the wakeup receiver of the first wireless communication device, a payload of the wakeup packet according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme; based on the payload of the wakeup packet, activate a transceiver of the first wireless communication device; and transmit to the second wireless communication device feedback information to indicate an adjustment of the OOK modulation scheme over the plurality of OFDM tones.
 22. The apparatus of claim 21, wherein the plurality of OFDM tones comprises 12 OFDM tones.
 23. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor, enable the at least one computer processor to cause a first wireless communication device to: detect, at a wakeup receiver of the first wireless communication device, a wakeup packet from a second wireless communication device, a preamble of the wakeup packet from the second wireless communication device modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme; demodulate, at the wakeup receiver of the first wireless communication device, a payload of the wakeup packet according to an On-Off keying (OOK) modulation scheme over a plurality of OFDM tones of the OFDM scheme, demodulating the payload comprises demodulating a payload value of the payload by determining an OOK On-state of the payload value when an OOK transmit pulse is detected during at least one OFDM symbol period, and determining an OOK Off-state of the payload value when the OOK transmit pulse is not detected during the OFDM symbol period; and based on the payload of the wakeup packet, activate a transceiver of the first wireless communication device.
 24. The product of claim 23, wherein the instructions, when executed, cause the first wireless communication device to transmit to the second wireless communication device feedback information to indicate an adjustment of the OOK modulation scheme over the plurality of OFDM tones. 